CN1327416C

CN1327416C - Optical recording medium and recording/reading method and recording/reading apparatus for optical recording medium

Info

Publication number: CN1327416C
Application number: CNB2003801064829A
Authority: CN
Inventors: 野田善宏; 久保秀之
Original assignee: Mitsubishi Chemical Corp
Current assignee: CMC Magnetics Co
Priority date: 2002-12-17
Filing date: 2003-12-12
Publication date: 2007-07-18
Anticipated expiration: 2023-12-12
Also published as: JP2004199757A; CN1992002A; CN1726537A

Abstract

In an optical recording medium of a single-sided incident type having a plurality of recording layers, recording/reading conditions (for example, tracking polarity, recording pulse strategy, recording recommended power, etc.) can be instantaneously switched according to each of the recording layer, and recording or reading of information can be accurately and surely performed under recording/reading conditions adapted to each recording layer. A control unit reads out layer information from one recording layer of the optical recording medium in which the layer information is recorded in each of the plural layers, on which recording or reading of information can be performed by irradiating a laser beam from one side thereof (layer information reading step), and controls so that recording or reading is performed under recording/reading conditions adapted to a recording layer specified on the basis of the layer information (recording controlling step).

Description

Record/the read method of optical record medium and optical record medium and device

Technical field

The present invention relates to a kind of have a plurality of recording layers can be by carrying out thereon from one side illuminating laser beam to recording of information and the optical record medium that reads (for example DVD-R etc.), and the record/read method and the recording/reading apparatus that are used for this optical record medium.

Background technology

As External memory equipment, extensively be familiar with and popularized such as the various optical record mediums of CD-R, CD-RW, MO etc., because they can store bulk information and can be by random access easily such as the signal conditioning package of computing machine.Along with the increase of the quantity of information of handling, need to improve recording density.

In various optical record mediums, optical record medium (CD) (for example CD-R, DVD-R, DVD+R etc.) with the recording layer (being also referred to as the recording layer that contains dyestuff) that contains organic dyestuff has especially obtained being extensive use of because they relatively cheap and with the read-only optical disc compatibility.

The medium such as CD-R that representative has the CD of the recording layer that contains dyestuff for example is stepped construction, and this stepped construction has recording layer and the reflection horizon that contains dyestuff successively on transparent dish substrate, and covering contains the layer of dyestuff and the protective seam in reflection horizon.Utilizing laser beam to see through substrate writes down and reads.

DVD-R as representative has stepped construction equally; wherein on the first transparent plate substrate, be formed with recording layer, reflection horizon that contains dyestuff and the protective seam that covers them in order, and on protective seam by or be not formed with as the so-called dumb bid (its can for transparent or opaque) of the second dish substrate and be formed on this on-chip reflection horizon of second dish by bonding coat.Be used to write down and read from the laser beam of a side of coiling through the first transparent plate substrate.This dumb bid can only be transparent or opaque dish substrate, perhaps can be provided with the layer that is different from the reflection horizon.Simultaneously, DVD+R has the structure much at one with DVD-R, represents explanation to it with DVD-R below.

In order significantly to improve the recording capacity of optical record medium, as above two single face DVD-R are fit together has the medium of two recording layers with formation, and it is known as two-sided DVD-R (two-sided, DVD-dual layer-R).Write down and read (promptly by laser beam is shone each recording layer from both sides, from a side illuminating laser beam of medium with near the enterprising line item of recording layer of this side with read, simultaneously from the opposite side illuminating laser beam of medium with near the enterprising line item of another recording layer of described opposite side and read).

In addition, the optical record medium with phase change recording layers (CD) such as CD-RW, DVD-RW etc. also is widely known by the people.Rewritable optical record medium with phase change recording layers usually on the recording layer and under have protective seam.

For optical record medium with a plurality of recording layers, in recent years, (for example need following single face incident type optical record medium, single face incident type DVD-R): on this medium, can be by coming at the enterprising line item of a plurality of recording layers from a side illuminating laser beam and reading, with the size of avoiding recording/reading apparatus and the increase of complicacy, and make it possible to read continuously from these a plurality of recording layers.

In order to satisfy above demand, a kind of double deck type single face incident type DVD-R with two recording layers has for example been proposed, as the single face incident type optical record medium with following structure (for example, referring to Japanese unexamined patent publication No. communique No.HEI 11-66622).

For example, form double deck type single face incident type DVD-R by stacked in order following multilayer on the first printing opacity substrate: first recording layer by organic dyestuff is made, can come thereon information is carried out optical recording by irradiation recording laser bundle; By first reflection horizon that semi-transparent reflectance coating is made, it can see through a part that reads laser beam; The middle layer, it can see through the recording laser bundle and read laser beam; Second recording layer by organic dyestuff is made can come thereon information is carried out optical recording by irradiation recording laser bundle; Second reflection horizon, laser beam is read in reflection; And the second printing opacity substrate.

In the single face incident type optical record medium with a plurality of recording layers such as dual-layer, single-sided incident type DVD-R etc., best titime/reading conditions (for example recording impulse strategy (Write strategy, write-in policy), recording power, readout power etc.) depends on each recording layer and significantly different.

For this reason, hope is carried out for example can switching record/reading conditions such as recording impulse strategy, recording power, readout power etc. to recording of information or the recording/reading apparatus that reads on each recording layer of the single face incident type optical record medium with a plurality of recording layers, carries out recording of information thus accurately and reliably or reads.

Particularly, can carry out random access to each recording layer of optical record medium to write down or to read information, must immediately switch record/reading conditions according to recording layer in order to make recording/reading apparatus.

For example have such method: provide address information continuously to a plurality of recording layers, recording/reading apparatus determines that according to the address information that is read which recording layer is relevant layers be.Yet this method is still to have difficulty aspect which recording layer immediately differentiating the relative recording layer.

Summary of the invention

Consider above problem, the recording/reading apparatus that the purpose of this invention is to provide a kind of optical record medium, is used for the record/read method of this optical record medium and is used for this optical record medium, wherein, can maybe to read the recording of information layer according to the recorded information thereon in the optical record medium and immediately switch record/reading conditions, in described optical record medium, carry out recording of information or read at a plurality of recording layers by coming from one side illuminating laser beam such as recording impulse strategy, recording power, readout power etc. from it.

Another object of the present invention is that the recorded information thereon in being suitable for optical record medium maybe will be from its record/reading conditions that reads the recording of information layer (for example, follow rail polarity (trackingpolarity), recording impulse strategy, recording power, readout power etc.) under write down or read information accurately and reliably, in described optical record medium, carry out recording of information or read at a plurality of recording layers by coming from one side illuminating laser beam.

Record/the read method that is used for optical record medium according to the present invention may further comprise the steps: layer information read step, by the recording layer reading layer information of control module from optical record medium, in described optical record medium, can be by come all to record described layer information on it recorded information or from a plurality of recording layers that wherein read information each from one side illuminating laser beam; And record controls step, by the recording layer reading layer information of control module from described a plurality of recording layers, described layer information any mode in the following manner is recorded on each recording layer in described a plurality of recording layer: with the highest significant position counter-rotating of address information, represent whole address informations with all bit reversals of whole address informations and by two;

Preferably, this method also comprises record/reading conditions read step, by the record/reading conditions for each recording layer of control module reading and recording in optical disc recording medium.

The recording/reading apparatus that is used for optical record medium according to the present invention comprises: layer information reading unit, be used for a reading layer information from described a plurality of recording layers, described layer information any mode in the following manner is recorded on each recording layer in described a plurality of recording layer: with the highest significant position counter-rotating of address information, represent whole address informations with all bit reversals of whole address informations and by two; And record/read control module, be used to control so that under the record/reading conditions that is suitable for according to the recording layer of layer information appointment, write down or read.

Preferably, described recording/reading apparatus also comprises record/reading conditions reading unit, is used for the record/reading conditions for each recording layer of reading and recording at optical record medium.

The optical record medium that writes down thereon or read with the record/read method that is used for optical record medium according to claim 1 according to the present invention comprises a plurality of recording layers, can on each recording layer, all record a layer information by from one side illuminating laser beam recorded information or read information on described a plurality of recording layers from it; Described layer information any one in the following manner is recorded: the highest significant position counter-rotating of the address information of any that will be in two adjacent recording layers in described a plurality of recording layers, with all bit reversals of whole address informations of a recording layer and whole address informations of representing a recording layer by two (complement).

Preferably, optical record medium has two recording layers as described a plurality of recording layers.

In addition, preferably, in the record/reading conditions of each recording layer at least one carried out record.

Record/reading conditions comprises the rail information of following.

Preferably, record/reading conditions comprises recording impulse strategy and/or record recommendation power.

In addition, preferably, record/reading conditions is recorded in a plurality of recording layers on the layer near the laser beam incident side.

Preferably, each recording layer is the recording layer that contains dyestuff.

Provide following advantage according to optical record medium of the present invention, the recording/reading apparatus that is used for the record/read method of this optical record medium and is used for this optical record medium: can immediately switch record/reading conditions according to recorded information thereon or from wherein reading the recording of information layer, as recording impulse strategy, recording power, readout power etc.

Another advantage provided by the invention is: can carry out recording of information accurately and reliably under the record/reading conditions (for example, following rail polarity, recording impulse strategy, recording power, readout power etc.) of recording of information layer or read being suitable for recorded information thereon or will therefrom reading.

Description of drawings

Fig. 1 is the integrally-built figure that shows the optical record medium (Class1) according to the embodiment of the invention typically;

Fig. 2 is the integrally-built figure that shows the optical record medium (type 2) according to the embodiment of the invention typically;

Fig. 3 is the integrally-built figure that shows typically according to the recording/reading apparatus of the optical record medium of the embodiment of the invention;

Fig. 4 is the process flow diagram of expression according to the processing of the control module execution of the recording/reading apparatus of the optical record medium of the embodiment of the invention;

Fig. 5 is the process flow diagram of expression according to the recording processing of the control module execution of the recording/reading apparatus of the optical record medium of the embodiment of the invention; And

Fig. 6 is the process flow diagram that reads processing that expression is carried out according to the control module of the recording/reading apparatus of the optical record medium of the embodiment of the invention.

Embodiment

Below with reference to Fig. 1 to Fig. 6 to describing according to the optical record medium (write-once (write-once) type optical record medium) of the embodiment of the invention, the record/read method and the recording/reading apparatus that are used for this optical record medium.

Optical record medium according to present embodiment is the single face incident type optical record medium with a plurality of recording layers, can be by carrying out recording of information from one side irradiates light (laser beam) or reading.

In the present embodiment, will describe as the example (single face incident type DVD-R) of single face incident type optical record medium with the DVD-dual layer-R (write-once type optical record medium) of the single face incident type that for example has two recording layers.

(1) structure of optical record medium

At first, as optical record medium, two types optical record medium (CD) with different layers stack structure is described according to present embodiment.

(A) Class1

Fig. 1 is the optical record medium (Class1 that shows typically according to present embodiment; The single face incident type optical record medium of cascade type) cut-open view.

According to the optical record medium of the Class1 of present embodiment first substrate (first substrate in plate-like transparent (light-permeable), the first light-permeable substrate) has in order on 1: first recording layer (first recording layer that contains dyestuff, first contains the recording layer of dyestuff) 2, translucent first reflection horizon (hereinafter being called translucent reflective layer) 3, middle resin layer (middle layer) 4, contain second recording layer (second recording layer, second contains the recording layer of dyestuff), 5, second reflection horizon 6, bonding coat 7 and second substrate (second substrate) 8 of dyestuff.From first substrate, 1 side illumination beam (laser beam) to write down or to read.

In the present embodiment, " transparent (light-permeable) " expression " for being used at the enterprising line item of optical record medium or being transparent (light-permeable) " from the light beam that optical record medium reads.Transparent (light-permeable) layer comprises more or less and to absorb the layer that is used to the light beam that writes down or read.For example, when this layer is not less than 50% (preferably being not less than 60%) for the transmittance of the wavelength of the light beam that is used to write down or read, think in fact light-permeable (transparent) of this layer.

On first transparent substrate 1 and middle resin layer 4, be formed with recess and protuberance (bank (land) and ditch (groove)).Utilize recess and/or protuberance to form track record.Here, the track record 11 on transparent first substrate 1 is by the ditch portion of first substrate 1, and promptly the protuberance with respect to the incident direction of light forms.Track record 12 on the middle resin layer 4 is by the ditch portion of middle resin layer 4, and promptly the protuberance with respect to the incident direction of light forms.In addition,

track record

11 and 12 can be formed by the recess with respect to the incident direction of light, perhaps can be by these two forms with respect to the recess of incident direction of light and protuberance.Usually, preferably, track record is formed by the protuberance with respect to the incident direction of light.In the present invention, unless stated otherwise, otherwise recess and protuberance define with respect to the incident direction of light that is used to write down or read.

These

track records

11 and 12 are constituted as with predetermined amplitude and frequency along radial direction snakelike slightly (this is called " swing (wobble) ").For example, forming a plurality of isolated holes (pit address) according to ad hoc rules on the bank (this be called " bank prefabricated pit (LandPre-Pit) " near track 11 or track 12; LPP).Utilize the bank prefabricated pit to come recording address information in advance.Can form prefabricated pit to out of Memory.Also can the inverted wobbles direction or frequency modulated, write down this information thus.

Next, will describe each layer.

(a) for first substrate 1

Wish that first substrate 1 has excellent optical, that is, first substrate 1 be transparent, have a little birefraction etc.Wish that also first substrate 1 has excellent moulding character,, can easily form first substrate 1 with injection moulding that is.When first substrate 1 had little hydroscopicity, this character was desirable, because can reduce the bending (inclination) of substrate, and can realize the favorable mechanical characteristic.

In addition, wish that first substrate 1 has shape stability, so that optical record medium has rigidity to a certain degree.When second substrate 8 has enough shape stabilities, do not need first substrate 1 to have big shape stability.

As this material, can use resin (for example acryl resin, methacrylic resin, polycarbonate resin, polyolefin resin (amorphous polyolefin particularly), vibrin, polystyrene resin, epoxy resin etc.) and glass.First substrate 1 can comprise multilayer.The resin bed of making by such as the radioactive ray hardening resin of UV hardening resin etc. can be set on the substrate of making by glass, resin etc.In addition, " radioactive ray " are the general names of light (ultraviolet ray, visible light, infrared ray etc.), electron beam etc.

Simultaneously, from optical property, such as high productivity, cost, agent of low hygroscopicity, the shape stability equal angles of mouldability etc., polycarbonate is preferred.From chemical-resistant, agent of low hygroscopicity equal angles, amorphous polyolefin is preferred.From the high-speed response equal angles, glass substrate is preferred.

First substrate 1 preferably approaches.The thickness of first substrate 1 is preferably 2mm or littler, more preferably 1mm or littler.Distance between object lens and the recording layer is more little and substrate is thin more, and coma aberration (coma aberration) is just more little, and this helps improving recording density.In order to obtain sufficient optical property, hydroscopicity, moulding character and shape stability, need certain thickness.Therefore, preferably, the thickness of first substrate 1 is generally 10 μ m or bigger, more preferably is 30 μ m or bigger.

In order on first recording layer 2 of this optical record medium and second recording layer 5, all to write down well and to read, wish suitably to adjust the distance between object lens and this two recording layers.For example, preferably,, two-layer visit is become easy because make with the roughly intermediate point place of focal point settings between two recording layers of object lens.

More specifically, in DVD-ROM and DVD-R system, when the thickness of substrate is 0.6mm, be optimum with the distance adjustment between object lens and the recording layer.

When this layer structure and DVD-ROM were compatible, the most preferably, the thickness of first substrate 1 obtained for half of the film thickness that deducts middle resin layer 4 from 0.6mm.If like this, the roughly intermediate point between then two-layer is about 0.6mm, can easily carry out focus servo control thus on two recording layers.

When other layer of existing between second recording layer 5 and first reflection horizon 3 such as cushion, protective seam etc., most preferably, the thickness of first substrate 1 obtains for half of the thickness sum that deducts this layer and middle resin layer 4 from 0.6mm.

On first substrate 1 helically or with one heart shape ground be formed with recess and protuberance with formation ditch and bank.Usually,, record the information on first recording layer 2 and from first recording layer 2 and read information as track record with these ditches and bank.Under the situation of so-called DVD-R dish (thereon by be that 0.6 to 0.65 object lens are that the laser beam of 650nm is carried out optically focused and write down and read to wavelength with numerical aperture), usually form first recording layer 2 by spin coating, thereby the film of first recording layer 2 is thick in ditch portion, and this is suitable for record and reads.

In this optical record medium, preferably, the ditch portion of first substrate 1 protuberance of the direction of incident beam (that is, with respect to) is as track record 11.Here, recess and protuberance are parts recessed with respect to the direction of incident beam and that protrude.Usually, the width of ditch is about 50 to 500nm, and the degree of depth of ditch is about 10 to 250nm.When track record was spirality, track space was preferably about 0.1 to 2.0 μ m.First substrate 1 can have pit or protruding hole as required, as bank prefabricated pit etc.

From the angle of cost, preferably, in process of injection molding, (stamper) makes the substrate with this recess and protuberance by the pressing mold with recess and protuberance.When on the substrate of making by glass etc., forming, can on this resin bed, form recess or protuberance such as track record etc. by the resin bed made such as the radioactive ray hardening resin of UV hardening resin etc.

(b) for first recording layer 2

Usually, the susceptibility of first recording layer 2 almost equates with the susceptibility of the middle recording layer that uses of single face recording medium (" single face " for example represents CD-R, DVD-R, DVD+R etc.).

In order to realize good record/reading performance, preferably first recording layer 2 contains the low heating dyestuff with high index of refraction.

In addition, preferably, within the proper range that is combined in reflection of light, transmission and absorption in first recording layer 2 and first reflection horizon 3, thus, the heat during having improved the record susceptibility and having reduced record is disturbed.

As this organic dye material, there are big ring azepine annulene class dyestuff (phthalocyanine dye, naphthalene phthalocyanine dye, porphyrin dye etc.), pyrroles's methylene base class dyestuff, polymethine class dyestuff (cyanine dyes, merocyanine dyes, this overstate (squalirium) dyestuff etc.), flower quinone (anthoraquinone) class dyestuff, Azulene (azulenium) class dyestuff, metal complex azo dyes, metal complex indoaniline class dyestuff etc.

In above-mentioned various organic dyestuff, preferable alloy complex compound azo dyes is because they have excellent record susceptibility, permanance and photostability.Specifically, be preferably as follows the general formula (I) or (II) compound of representative:

(wherein, A ¹Ring and A ²Ring is nitrogenous aromatic heterocycle, and it can have substituting group separately independently; B ¹Ring and B ²Ring is an aromatic rings, and it can have substituting group separately independently; X is the alkyl that 1 to 6 carbon is replaced by at least two fluorine atoms).

The organic dyestuff that is used for the recording layer of this optical record medium is preferably at about visible light of 350 to 900nm has maximum absorption wavelength λ max and suitable with the blue dye composition that writes down to the laser of nearly microwave near infrared scope.The more preferably suitable dyestuff that writes down with following laser: the wavelength that is generally used for CD-R is the near-infrared laser of about 770 to 830nm (being typically 780nm, 830nm etc.), and the wavelength that is used for DVD-R is about red laser of 620 to 690nm (being typically 635nm, 650nm, 680nm etc.); Or wavelength is 410 or the so-called blue laser of 515nm.

Can use a kind of dyestuff, perhaps mix the dyestuff of two or more identical or different kinds and use them.In addition, can unite and use the suitable dyestuff that writes down with multi-wavelength's writing light beam, with the optical record medium of realizing that available multiwave laser beam writes down.

Recording layer (for example can contain transition metal chelate, acetylacetone chelate, xenyl two mercaptan (bisphenyldithiol), salicylaldoxime, two two sulfo-s-α-diketone etc.) as singlet oxygen (singlet oxygen) quencher so that recording layer is stable or improve photostability, perhaps contain record sensitizer (for example metal based compound etc.) to improve the record susceptibility.At this, described metal based compound is the metal such as transition metal etc. that contains forms such as atom, ion or cluster in the compound.As this metal based compound, for example there is organometallics, as ethylenediamine complex compound, azomethine complex compound, phenylhydroxylamine complex compound, phenanthroline complex compound, dihydroxy azobenzene complex compound, dioxime complex compound, nitroso-amino phenol complex compound, pyridine radicals triazine complex compound, acetylacetonate complex, metallocene, porphyrin complex etc.For metallic atom without limits, still be preferably transition metal.

In addition, can also use bonding agent, levelling agent (leveling agent) and defoamer etc. together, to make the recording layer of this optical record medium as required.As preferred adhesive, there are polyvinyl alcohol (PVA), polyvinylpyrrolidone, nitrocellulose, cellulose acetate, ketone resin, acryl resin, polystyrene resin, urethane resin, polyvinyl butyral, polycarbonate, polyolefin etc.

The film thickness of recording layer is not specifically limited, because suitable film thickness is according to the difference of recording method etc. and difference.Yet for obtaining enough modulation amplitudes, usually, film thickness is preferably 5nm or bigger, and more preferably 10nm or bigger is preferably 20nm or bigger especially.Yet,, require the recording layer can not be blocked up for printing opacity suitably in this optical record medium.Therefore, the film thickness of recording layer is generally 3 μ m or littler, is preferably 1 μ m or littler, more preferably 200nm or littler.The film thickness of recording layer from ditch portion to bank portion difference.In this optical record medium, the film thickness of recording layer is the thickness at the ditch portion place of substrate.

As the method for making recording layer, can use the thin-film deposition that carries out usually, for example vacuum evaporation (vacuum evaporation), sputtering method, scrape the skill in using a kitchen knife in cookery, cast (cast) method, spin coating, infusion process etc.From the angle of throughput rate and cost, spin-coating method is preferred.Vacuum vapour deposition is more more preferred than rubbing method, because it can produce the uniform recording layer of film thickness.

Recording layer be by situation about being made by spin coating under, rotational speed is preferably 10 to 15000rmp.After spin coating, can anneal or apply the processing of solvent vapo(u)r.

Employed coating solvent when forming recording layer with rubbing method (for example scraping the skill in using a kitchen knife in cookery, casting, spin-coating method, infusion process etc.) to the type of this solvent without limits, therefore, can use any solvent as long as it does not corrode substrate.For example have: the ketols solvent, as diacetone alcohol, 3-hydroxy-3-methyl-2-butanone etc.; Cellosolve kind solvent, for example methyl cellosolve, ethyl cellosolve etc.; Catenanes solvent, for example normal hexane, normal octane etc.; Cyclic hydrocar-bons solvent, for example cyclohexane, methylcyclohexane, ethyl cyclohexane, dimethyl cyclohexane, n-butyl cyclohexane, tert-butyl group cyclohexane, cyclooctane etc.; Perfluor alkanols solvent, for example tetrafluoropropanol, octafluoropentanol, hexafluoro butanols etc.; Hydroxycarboxylic acid esters solvent, for example methyl lactate, ethyl lactate, methyl-2-hydroxy-iso-butyric acid etc.; Or the like.

Under the situation of vacuum evaporation, for example, with organic dyestuff and have the dyestuff that needs and put into the crucible that is arranged on vacuum chamber such as various adjuvants etc., by suitable vacuum pump with the inner pumping of vacuum chamber to about 10 ^-2To 10 ^-5Pa afterwards, so that dyestuff and the evaporation of other adjuvant are deposited on the substrate of placing facing to crucible the recording layer composition, forms recording layer to the crucible heating thus.

(c) for first reflection horizon 3

First reflection horizon 3 is the reflection horizon with certain light transmission.That is, first reflection horizon 3 is the reflection horizon that have little absorptivity, are not less than 40% transmittance and suitable reflecting rate (being not less than 30% usually).For example, have the thin metal film of high reflectance, suitable transmittance can be provided by setting.Wish that first reflection horizon 3 has certain corrosion stability.In addition, wish that translucent reflection horizon 3 has barrier property, so that first recording layer 2 is not subjected to the influence of infiltration on the upper strata (here for middle resin layer 4) in first reflection horizon 3.

In order to ensure high-transmission rate, the thickness in first reflection horizon 3 is preferably 50nm or littler usually.The thickness in first reflection horizon 3 is 30nm or littler more preferably, and 25nm or littler more preferably.Yet, need first reflection horizon 3 that certain thickness be arranged, with the influence on the upper strata of avoiding first reflection horizon 3 on first recording layer 2.Thus, the thickness in first reflection horizon 3 is generally 3nm or bigger, more preferably 5nm or bigger.

Material as first reflection horizon 3, can use the metal and the semimetal of simple metal or alloy form, as Au, Al, Ag, Cu, Ti, Cr, Ni, Pt, Ta, Pd, Mg, Se, Hf, V, Nb, Ru, W, Mn, Re, Fe, Co, Rh, Ir, Zn, Cd, Ga, In, Si, Ge, Te, Pb, Po, Sn, Bi and rare earth metal, it has suitable high reflectance for the wavelength that reads light beam.Wherein, Au, Al and Ag have high reflectance, therefore are suitable as the material in first reflection horizon 3.Translucent reflection horizon 3 can comprise other composition outside the mentioned component as major component.

It is preferred especially because its cost is low and reflectivity is high as the material of principal ingredient to comprise Ag.Here, principal ingredient represents that content is no less than 50% material.

Because the thin film thickness in first reflection horizon 3 reads noise so the big crystal grain of film causes.Therefore, preferably use material with little crystal grain.Because fine silver has big crystal grain usually, so preferably use the Ag of alloy form.

Particularly, preferably comprise Ag, and comprise at least a element of from the group that comprises Ti, Zn, Cu, Pd, Au and rare earth metal, selecting of 0.1 to 15 atom % as principal ingredient.During in having comprised Ti, Zn, Cu, Pd, Au and rare earth metal two or more, each in them can be 0.1 to 15 atom %.Yet, they and be preferably 0.1 to 15 atom %.

A kind of particularly preferred alloy composition is the composition that comprises following composition: as the Ag of principal ingredient, at least a element of from the group that comprises Ti, Zn, Cu, Pd and Au, selecting of 0.1 to 15 atom %, and at least a rare earth element of 0.1 to 15 atom %.In rare earth metal, neodymium is for preferred especially.More specifically, AgPdCu, AgCuAu, AgCuAuNd, AgCuNd etc. are preferred.

As first reflection horizon 3, only the layer of being made by Au is preferred, because it has little crystal grain and corrosion stability, but it is more expensive than Ag alloy.

Alternatively, can use by Si make the layer as first reflection horizon 3.

Can the film of the film of the antiradar reflectivity made by nonmetallic material and high reflectance is stacked mutually forming multilayer, and they are used as the reflection horizon.

Method as forming first reflection horizon 3 for example can adopt sputter, ion plating, chemical vaporization, vacuum evaporation etc.Can between first substrate 1 and first recording layer 3, inorganic or organic middle layer and bonding coat be set, to improve reflectivity, record performance and cohesive.For example, middle layer (or bonding coat), first recording layer 2 and middle layer (or bonding coat) and first reflection horizon 3 can be layered on first substrate 1 in order, so that the middle layer (or bonding coat) between first substrate 1 and first recording layer 2 to be provided, and provide the middle layer (or bonding coat) between first recording layer 2 and first reflection horizon 3.

(d) for middle resin layer 4

Middle resin layer 4 need be transparent, and can form ditch and hole thereon by recess and protuberance.Preferably, middle resin layer 4 have strong cohesive and its sclerosis and when bonding shrinkage factor little, this shape to medium provides higher stability.

Wish that middle resin layer 4 made by the material that does not damage second recording layer 5.The middle resin layer 4 and second recording layer 5 are soluble mutually under normal conditions, because middle resin layer 4 is usually by making with the soluble resin of the dye materials of second recording layer 5.For this reason, wish between this is two-layer, to be provided with described after a while cushion, to prevent middle resin layer 4 dissolving second recording layers 5 and to prevent from it is caused damage.

In addition, wish that middle resin layer 4 made by the material that does not damage first reflection horizon 3.Can between this is two-layer, provide described after a while cushion to avoid damage.

In this optical record medium, preferably, the film thickness of middle resin bed 4 is accurately controlled.Usually, the film thickness of middle resin layer 4 is preferably 5 μ m or bigger.Certain distance must be set, so that two recording layers are carried out focus servo control respectively between two recording layers.Though the film thickness of middle resin layer 4 depends on focus servo mechanism, it need be 5 μ m or bigger usually, is preferably 10 μ m or bigger.Usually, because object lens have bigger numerical aperture, so the distance between two recording layers can be less.Yet, when middle resin bed 4 is blocked up, spend and adjust the focus servo of two recording layers for a long time and must make object lens moving long distance, so this is undesirable.In addition, blocked up layer need harden for a long time, and this causes the decline of throughput rate.Therefore, the film thickness of middle resin layer 4 is preferably 100 μ m or littler.

On middle resin layer 4, form spirality or heart-shaped together recess and protuberance, to form ditch and bank.Usually, these ditches and bank are as track record recorded information or from wherein reading information in second recording layer 5.Because second recording layer 5 forms with spin coating,, be suitable for thus writing down and reading so its film is thick at the ditch place.In this optical record medium, the ditch protuberance of the direction of incident beam (promptly with respect to) that preferably uses middle resin layer 4 is as track record 12.Here, recess and protuberance are recess and the protuberances with respect to the direction of incident beam.Usually, the ditch width is about 50 to 500nm, and its degree of depth is about 10 to 250nm.When track record was spirality, track space was preferably about 0.1 to 2.0 μ m.Can form pit or protruding hole as required, as the bank prefabricated pit.

From the angle of cost, preferably, make this recess and protuberance by being transferred to hardening resin (for example resin of light-hardening resin and other kind) from the recess of the resin moulding-die with recess and protuberance etc. and protuberance.Hereinafter, sometimes this method is called 2P method (light polymerization method).

As the material of middle resin layer 4, for example can be with thermoplastic resin, thermosetting resin, electron-beam curing resin, ultraviolet hardening resin (comprise and postpone constrictive type) etc.

Can be by thermoplastic resin, thermosetting resin etc. being dissolved in the appropriate solvent with the preparation coating solution, using this solution and this solution is carried out drying (heating) and form middle resin layer 4.Under the situation of ultraviolet hardening resin, can by dissolving resin in statu quo or with resin dissolves in appropriate solvent with the preparation coating solution, be coated with this coating solution and irradiation ultraviolet radiation so that hardening of resin forms middle resin layer 4.There are various types of ultraviolet hardening resins.Yet, can use wherein any, as long as it is transparent.Can use a kind of in these materials, perhaps in them some can be mixed and use.Not only can adopt individual layer but also can adopt multilayer.

As coating process, the same with recording layer, can adopt coating process such as spin coating, casting etc.In these methods, spin coating is preferred.Can wait with serigraphy (screen print) and be coated with resin with high viscosity.Preferably, use to have low-viscosity ultraviolet hardening resin for 20 to 40 ℃, do not need solvent because be coated with this resin in temperature.Preferably, so that being 20 to 4000mPas mode, its viscosity prepares resin.

As UV cured bonding agent, there are UV cured bonding agent of group type and cationic UV cured bonding agent, these two kinds all is available.

As the UV cured bonding agent of group type, all known compositions all are available.Use comprises UV cured compound and the Photoepolymerizationinitiater initiater composition as necessary component.As UV cured compound, can use simple function (methyl) acrylate and multifunctional (methyl) acrylate as the polymerizable monomer component.They can use separately, and perhaps wherein two or more are used in combination.In the present invention, acrylate and methacrylate are referred to as (methyl) acrylate.

For example, below be the polymerizable monomer that can be used for this optical record medium.As simple function (methyl) acrylate, for example exist to have following group as substituent (methyl) acrylate etc., described group has methyl, ethyl, propyl group, butyl, amyl group, the 2-ethylhexyl, octyl group, nonyl, dodecyl, cetyl, octadecyl, cyclohexyl, benzyl, methoxy ethyl, butoxyethyl group, the phenoxy group ethyl, the Nonylphenoxy ethyl, tetrahydrofurfuryl, glycidyl, the 2-hydroxyethyl, the 2-hydroxypropyl, 3-chloro-2 hydroxypropyls, dimethyl aminoethyl, the diethylamino ethyl, the Nonylphenoxy ethyl tetrahydrofurfuryl, the tetrahydrofurfuryl of caprolactone sex change, isobornyl, two cyclopentyl, dicyclopentenyl, two cyclopentene oxygen ethyls etc.

As multifunctional (methyl) acrylate, two (methyl) acrylate that has following material: 1,3-butylene glycol, 1,4-butylene glycol, 1,5-pentanediol, 3-methyl isophthalic acid, 5-pentanediol, 1,6-hexanediol, neopentyl glycol, 1,8-ethohexadiol, 1,9-nonanediol, tristane base dimethanol, ethylene glycol, polyglycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol etc.; Two (methyl) acrylate of three (2-hydroxyethyl) chlorinated isocyanurates; By 4 moles or more oxirane or epoxypropane being added to two (methyl) acrylate of the glycol that obtains in 1 mole of neopentyl glycol; By 2 moles of ethylene oxide or epoxypropane being added to two (methyl) acrylate of the glycol that 1 mole of bisphenol-A obtains; By 3 moles or more oxirane or epoxypropane being added to two or three (methyl) acrylate of the triol that obtains in the trimethylolpropane; By 4 moles or more oxirane or epoxypropane being added to two (methyl) acrylate of the glycol that 1 mole of bisphenol-A obtains; Trimethylolpropane tris (methyl) acrylate, five erythrite three (methyl) acrylate, poly-(methyl) acrylate of two (five erythrites), phosphoric acid (methyl) acrylate of oxirane sex change, alkylation phosphoric acid (methyl) acrylate of oxirane sex change etc.

Can be used as polyreactive oligomers with the material that polymerizable monomer uses is: polyester (methyl) acrylate, polyethers (methyl) acrylate, epoxy (methyl) acrylate, polyurethane (methyl) acrylate etc.

As the Photoepolymerizationinitiater initiater that is used for this optical record medium, can use any known initiating agent that can make by the UV cured compound sclerosis of using of polyreactive oligomers and/or polymerizable monomer representative.As Photoepolymerizationinitiater initiater, it is suitable that molecule fission type or hydrogen are captured type.

As this Photoepolymerizationinitiater initiater; that be fit to use has styrax (bensoin) isobutyl ether, 2; 4-diethyl thioxanthone, 2-isopropyl thioxanthone, benzyl, 2; 4; 6-trimethylbenzoyl diphenyl phosphine oxide, 2-benzyl-2-dimethylamino-1-(4-morpholinyl phenyl)-Ding-1-ketone, two (2; 6-dimethoxy benzoyl)-2,4,4-trimethylphenyl phosphine oxide etc.Molecule fission type as different therewith can also be used in combination: 1-hydroxycyclohexylphenylketone, benzoin ethyl ether, benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenylpropyl-1-ketone, 1-(4-isopropyl phenyl)-2-hydroxy-2-methyl propyl group-1-ketone, 2-methyl isophthalic acid-(4-methylbenzene sulfenyl)-2-morpholinyl third-1-ketone etc.In addition, can be used in combination following hydrogen and capture the type Photoepolymerizationinitiater initiater: benzophenone, 4-phenyl benzophenone, different phthalein benzophenone (isophthalphenone), 4-benzoyl-4 '-methyl-diphenyl sulfide etc.

As sensitizer to Photoepolymerizationinitiater initiater, can use the amine that can not cause with the addition reaction of above-mentioned polymerization composition, for example Trimethylamine, methyl dihydroxymethyl amine, triethanolamine, to the diethylamide benzoylformaldoxime, to dimethyl amido ethylamino benzonitrile acid esters, to dimethyl amido isoamyl benzene formic ether, N, N-dimethyl benzene methylamine, 4,4 '-two (diethyl amido) benzophenone etc.Preferably, select and use UV cured compound is had excellent resolvability and do not hinder the above-mentioned Photoepolymerizationinitiater initiater of UV transparent and one of sensitizer.

As cationic UV cured bonding agent, can be with any known composition.The epoxy resin of Photoepolymerizationinitiater initiater that contains cationic polymerization type is corresponding to this.As the light trigger of cationic polymerization type, there are sulfonium salt, salt compounded of iodine, diazo salt etc.

As the example of salt compounded of iodine, exist: the hexafluorophosphoric acid diphenyl iodnium, the hexafluoro-antimonic acid diphenyl iodnium, the tetrafluoro boric acid diphenyl iodnium, four (pentafluorophenyl group) boric acid diphenyl iodnium, two (dodecylphenyl) salt compounded of iodine of hexafluorophosphoric acid, two (dodecylphenyl) salt compounded of iodine of hexafluoro-antimonic acid, two (dodecyl) salt compounded of iodine of tetrafluoro boric acid, two (dodecylphenyl) salt compounded of iodine of four (pentafluorophenyl group) boric acid, hexafluorophosphoric acid 4-aminomethyl phenyl-4-(1-Methylethyl) phenyl salt compounded of iodine, hexafluoro-antimonic acid 4-aminomethyl phenyl-4-(1-Methylethyl) phenyl salt compounded of iodine, tetrafluoro boric acid 4-aminomethyl phenyl-4-(1-Methylethyl) phenyl salt compounded of iodine, four (pentafluorophenyl group) boric acid 4-aminomethyl phenyl-4-(1-Methylethyl) phenyl salt compounded of iodine etc.

As epoxy resin, bisphenol-A-chloropropylene oxide class, epoxy are alicyclic, any in long chain aliphatic, brominated epoxy resin, ethylene oxidic ester class, diglycidyl ethers, heterocyclic system etc. all is available.

As epoxy resin, the preferred epoxy resin with small-amount free chlorine and chlorion that uses damages the reflection horizon to avoid this resin.The amount of chlorine preferably is not more than 1 weight %, more preferably is not more than 0.5 weight %.

In the cationic ultraviolet hardening resin of per 100 weight %, the ratio of cationic polymerization type light trigger is generally 0.1 weight % to 20 weight %, preferred 0.2 weight % to 5 weight %.In order more effectively to use the wavelength in the visible radiation district near infrared range or the ultraviolet light source wave band, can be used in combination known photosensitizer.As this photosensitizer, there are anthracene, phenothiazine, benzyl first ketal, benzophenone, acetophenone etc.

In order to improve the various character of UV cured bonding agent, can add thermal polymerization inhibitor as required as other adjuvant, with hindered phenol, hindered amine, phosphite etc. is the antioxidant of representative, plastifier is silane coupling agent of representative etc. with epoxy silane, hydrosulphonyl silane, (methyl) propenyl silane.In these adjuvants, selection and use have excellent resolvability for UV cured compound and do not hinder the adjuvant of UV transparent.

(e) for second reading layer 5

Second recording layer 5 has usually than being used for the single face recording medium higher susceptibility of recording layer of (" single face " for example represents CD-R, DVD-R, DVD+R etc.).In this optical record medium, because the existence in first recording layer 2 and first reflection horizon 3 etc. reduces the power of incident beam, so carry out record with half power.Thereby second recording layer 5 need have extra high susceptibility.

In order to realize good record/reading performance, wish that dyestuff produces less heat and has big refractive index.

In addition, the combination of wishing second recording layer 5 and second reflection horizon 6 provides light reflection and the proper range that absorbs.Thus, can increase the record susceptibility, and the heat that can eliminate during the record is disturbed.

Therefore the material of the material of second recording layer 5 and deposition process and first recording layer 2 and deposition process only illustrate the difference between them much at one below.

The film thickness of second recording layer 5 is not subjected to concrete restriction, because suitable film thickness is according to recording method etc. and different.In order to obtain sufficient modulation amplitude, the film thickness of second recording layer 5 is preferably 10nm or bigger usually, and more preferably 30nm or bigger is preferably 50nm or bigger especially.Yet, in order to obtain suitable reflectivity, need this film can not be blocked up, film thickness is generally 3 μ m or littler, is preferably 1 μ m or littler, more preferably 200nm or littler.

The material that is used for first recording layer 2 and second recording layer 5 can be same to each other or different to each other.

(f) for second reflection horizon 6

Require second reflection horizon 6 to have high reflectance.Wish that reflection horizon 6 is highly durable.

In order to ensure high reflectance, the thickness in second reflection horizon 6 is preferably 20nm or bigger usually, more preferably 30nm or bigger, more preferably 50nm or bigger.For the pitch time that shortens manufacturing with reduce cost, preferably second reflection horizon 6 is thinned to a certain degree.Therefore, film thickness is generally 400nm or littler, more preferably 300nm or littler.

As the material in second reflection horizon 6, for example can use reading the metal that light wavelength has sufficiently high reflectivity, as Au, Al, Ag, Cu, Ti, Cr, Ni, Pt, Ta and Pd with the form of simple metal or alloy.In these metals, Au, Al and Ag are owing to its high reflectance is suitable for material as second reflection horizon 6.Except these metals as principal ingredient, second reflection horizon 6 can comprise following composition as other composition.As the example of other composition, there are such as Mg Se, Hf, V, Nb, Ru, W, Mn, Re, Fe, Co, Rh, Ir, Cu, Zn, Cd, Ga, In, Si, Ge, Te, Pb, Po, Sn, the metal of Bi and rare earth metal, and semimetal.

Comprise Ag as the film of key component since its cost low this film provides high reflectance and preferred especially, and when hereinafter described printing receiving layer of further setting, provide beautiful white background.Here, " principal ingredient " represents that its containing ratio is not less than 50% composition.

In order to ensure the high durability (high corrosion stability) in second reflection horizon 6, preferably use alloy form rather than as the Ag of fine silver.

In these alloys, comprising Ag is preferred as principal ingredient and the alloy that comprises at least a element of selecting of 0.1 to 15 atom % from the group that comprises Ti, Zn, Cu, Pd, Au and rare earth metal.When this alloy comprised in Ti, Zn, Cu, Pd, Au and the rare earth metal two or more, each in them can be included as 0.1 to 15 atom %.Yet preferably, these element sums are 0.1 to 15 atom %.

The particularly preferred of this alloy consists of: comprise Ag as principal ingredient; At least a element of from the group that comprises Ti, Zn, Cu, Pd and Au, selecting that comprises 0.1 to 15 atom %; And at least a rare earth element that comprises 0.1 to 15 atom %.In these rare earth element, neodymium is particularly preferred.More specifically, AgPdCu, AgCuAu, AgCuAuNd, AgCuNd etc. are preferred.

As second reflection horizon 6, only the layer of being made by Au is preferred because of its high durability (high corrosion stability), but more expensive than the layer of only being made by the Ag alloy.

Can film of making by nonmetallic materials with antiradar reflectivity and the film with high reflectance is stacked mutually with the formation multilayer, and used as second reflection horizon 6.

Method as forming second reflection horizon 6 for example exists sputter, ion plating, chemical vapour deposition, vacuum evaporation etc.Can on the upper surface in second reflection horizon 6 and lower surface, known inorganic or organic middle layer or bonding coat be set, to improve reflectivity, record performance, cohesive etc.

(g) for bonding coat 7

Bonding coat 7 need not transparent.The high adherence of bonding coat 7 and its sclerosis and the little shrinkability when bonding make shape of medium have stability, and this is preferred.

Preferably, bonding coat 7 is made by the material that does not damage second reflection horizon 6.Known inorganic or organic protective seam can be set, to avoid damage to reflection horizon 7 between this is two-layer.

In this optical record medium, the film thickness of bonding coat 7 is preferably 2 μ m or bigger usually.For the cohesive that obtains to be scheduled to, need certain film thickness.More preferably, the film thickness of bonding coat 7 is 5 μ m or bigger.Usually, preferably, the film thickness of bonding coat 7 is 100 μ m or littler, so that optical record medium is thin as far as possible.This is because thick film needs the long period to harden, and this causes throughput rate to descend.

The material of bonding coat 7 can be identical with the material of middle resin layer 4, perhaps can be pressure-sensitive double-sided belt etc.Push by pressure-sensitive double-sided belt being placed between second reflection horizon 6 and second substrate 8 and, can form bonding coat 7 it.

(h) for second substrate 8

Preferably, second substrate 8 has shape stability, so that optical record medium has certain rigid.That is, preferably, second substrate 8 has high mechanical stability and big rigidity.In addition, preferably, second substrate 8 has big cohesive for bonding coat 7.

When first substrate 1 does not have above-mentioned sufficient shape stability, need second substrate 8 to have big shape stability especially.Consider this, preferably, second substrate 8 has low hydroscopicity.Second substrate 8 need not transparent.Second substrate 8 can be the minute surface substrate, need not to have recess and protuberance on it.Thus, second substrate 8 need not always have good transfer printing in process of injection molding.

As this material, can use and the material identical materials that is used for first substrate 1.In addition, can use and contain the Al alloy substrates of Al as principal ingredient such as Al-Mg alloy etc., such as Mg-Zn alloy etc. contain the Mg alloy substrates of Mg as principal ingredient, by any substrate made in silicon, titanium and the pottery, the perhaps substrate of making by its combination.

From high productivity, cost, agent of low hygroscopicity, shape stability equal angles such as mouldability etc., polycarbonate is preferred.From the angle of chemical resistance, agent of low hygroscopicity etc., amorphous polyolefin is preferred.From the angle of high-speed response etc., glass substrate is preferably.

In order to make optical record medium have enough rigidity, preferably second substrate 8 is thick in to a certain degree, has the thickness that is not less than 0.3mm.Yet, just help making the recording/reading apparatus attenuation more because second substrate 8 is thin more, so the thickness of second substrate 8 is preferably 3mm or littler, 1.5mm or littler more preferably.

Second substrate 8 can be for not having the minute surface substrate of recess and protuberance on it.From the angle of easy manufacturing, preferably, make second substrate 8 with injection moulding.

The preferred compositions of first substrate 1 and second substrate 8 be exemplified as first substrate 1 and second substrate 8 is manufactured from the same material, and have same thickness.Like this, first substrate 1 is identical with the rigidity of second substrate 8, and this provides the favorable mechanical balance.Thus, medium can be not yielding owing to environmental change, and this is preferred.In this case, preferably, under the situation of environmental change, the distortion of each substrate occur in same direction and degree identical.

As another preferred exemplary of this combination, first substrate, 1 thin about 0.1mm, and second substrate, 8 thick about 1.1mm.Like this, object lens can easily improve recording density thus easily near recording layer.Therefore, this is preferably.In this case, first substrate 1 can be a flake shape.

(i) for other layer

In this stratification structure, can as required another layer arbitrarily be placed in these layers.Alternatively, another layer can arbitrarily be set on the outmost surface of this medium.Particularly, for example can be between first reflection horizon 3 and the middle resin layer 4, between middle resin layer 4 and second recording layer 5 or cushion is set as the middle layer between second reflection horizon 6 and the bonding coat 7.

Cushion is used to prevent two-layer mutual dissolving and prevents two-layer mutual mixing.Cushion can have other function outside the function that prevents dissolution phenomena.In addition, can place another middle layer as required.

Need the material of cushion not fused mutually, and have certain light transmission with second recording layer 5 or middle resin layer 4.Can use known inorganic or organic material to cushion.From the angle of character, preferably use organic material.For example, can use (i) metal or semiconductor, (ii) metal or semi-conductive oxide, nitride, sulfide, trisulfide, fluoride or carbonide, and (iii) amorphous carbon etc.Wherein, layer or the extremely thin metal level of being made by almost transparent dielectric material (comprising alloy) is preferred.

Particularly, such as the oxide of monox (silicon dioxide especially), zinc paste, cerium oxide, yttria etc.; Sulfide such as zinc sulphide, yttrium sulfide etc.; Nitride such as silicon nitride etc.; Silit; The potpourri of oxide and sulphur (trisulfide); And described after a while alloy is preferred.Ratio is that about 30: 70 to 90: 10 monox and the potpourri of zinc sulphide are preferred.Potpourri (the Y of sulphur, yttrium dioxide and zinc paste ₂O ₂S-ZnO) also be preferred.

As metal or alloy, silver or to comprise silver be preferred as principal ingredient and the alloy that comprises at least a element of selecting of 0.1 to 15 atom % from the group that titanium, zinc, copper, palladium, gold are formed.Comprising silver also is preferred as principal ingredient and the alloy that comprises at least a rare earth element of 0.1 to 15 atom %.As rare earth element, neodymium, praseodymium, cerium etc. are preferred.

It alternatively, can use any resin bed, as long as can not dissolve the dyestuff in the recording layer when making cushion.Particularly, the polymeric membrane that can make with vacuum evaporation or CVD method is useful.

The thickness of cushion is preferably 2nm or bigger, more preferably 5nm or bigger.Cross when thin when cushion, can not fully prevent above-mentioned mixed phenomenon.The thickness of cushion is preferably 2000nm or littler, more preferably 500nm or littler.Blocked up cushion is unnecessary for preventing mixed not only, and causes transmittance to descend.When this layer is when being made by dead matter, the film deposit of layer needs the long period, and this causes throughput rate ground to descend, and perhaps membrane stress increases.Thus, film thickness is preferably 200nm or littler.Particularly, because the film that is made of metal excessively reduces transmittance, so film thickness is preferably about 20nm or littler.

Protective seam can be set protect recording layer or reflection horizon.The material of protective seam is not subjected to concrete restriction, but can use any material, as long as its protection recording layer or reflection horizon are not influenced by external force.As the organic material of protective seam, there are thermoplastic resin, thermosetting resin, electron-beam curing resin, ultraviolet hardening resin etc.As the inorganic material of protective seam, there are monox, silicon nitride, MgF ₂, SnO ₂Deng.

Thereby can form protective seam to prepare coating solution and to use this solution and it is carried out drying by thermoplastic resin, thermosetting resin etc. being dissolved in the appropriate solvent.Under the situation of ultraviolet hardening resin; coating solution that can be by preparation ultraviolet hardening resin self or by ultraviolet hardening resin is dissolved in the coating solution that obtains in the suitable solution, uses this coating solution, to solution irradiation UV light so that its sclerosis, thereby the formation protective seam.As ultraviolet hardening resin, there is acryl resin, as urethane acrylate, epoxy acrylate, polyester acrylic fat etc.These materials can be used separately or use can be mixed.In addition, not only can use individual layer but also can use multilayer.

As the method that forms protective seam, the coating process of existence such as spin coating, cast etc., sputter, chemical vaporization etc.In these methods, spin coating is preferred.

The film thickness of protective seam is usually in the scope of 0.1 to 100 μ m.In this optical record medium, the film thickness of protective seam is preferably 3 to 50 μ m.

As required, can on the surface on surface that is not record/read light beam incident, the printing receiving layer be set, can write (printing) thereon by various transfer articles or the various instrument that writes such as ink-jet transfer article (printer), hot transfer article etc.

Alternatively, other recording layer can be set and form optical record medium with three or more recording layers.Two optical record mediums with this layer structure can be fit together in the mode of first substrate 1 in the outside, have the more jumbo medium of 4 recording layers with formation.

(B) type 2

Fig. 2 is a cut-open view of representing the optical record medium (optical record medium of type 2) according to present embodiment typically.

According to the optical record medium (optical record medium of the single face incident type of applying) of the type 2 of present embodiment transparent (light-permeable) first substrate (first substrate in disc shaped, the first light-permeable substrate) has in order on 21: first recording layer (first recording layer that contains dyestuff, first contains the recording layer of dyestuff) 22, translucent first reflection horizon (hereinafter being called translucent reflection horizon) 23, transparent bonding coat (middle layer) 24, cushion 28, second recording layer (second recording layer that contains dyestuff, second contains the recording layer of dyestuff) 25, second reflection horizon 26, second substrate of transparent disc shaped (second substrate) 27.From first substrate, 21 side illumination beams to carry out record/read.In the present embodiment, " transparent " expression is transparent to being used at enterprising line item of optical record medium and the light beam that reads from optical record medium.

On first substrate 21 and second substrate 27, be formed with recess and protuberance, to form each track record.Track record 31 on first substrate 21 is to form with the protuberance with respect to the direction of incident beam, and the track record 32 on second substrate 27 is to form with the recess with respect to the direction of incident beam.

Simultaneously, track record 31 can be formed by the ditch of first substrate 21 (that is, with respect to the recess of the direction of incident beam), and track record 32 can be formed by the ditch of second substrate 27 protuberance of the direction of incident beam (that is, with respect to).Usually, preferably, track record 31 is formed by the protuberance with respect to the direction of incident beam, and track record 32 is formed by the recess with respect to the direction of incident beam.Can be provided with as required and above different pit or protruding hole.In the present embodiment, unless stated otherwise, otherwise recess and protuberance be with respect to the incident beam direction that is used to write down or read and the definition.

Next will describe each layer.

Almost first substrate 1, first recording layer 2, first reflection horizon 3, second recording layer 5 with the optical record medium of Class1 is identical with second reflection horizon 6 according to first substrate 21, first recording layer 22, first reflection horizon 23, second recording layer 25 and second reflection horizon 26 of the optical record medium of the type 2 of present embodiment.

Except need not to form ditch and the hole with recess and protuberance, as the transparent adhesive layer 24 in middle layer almost with the middle resin layer 4 of the optical record medium of Class1 much at one.In addition, in the optical record medium of type 2, above Gou Hekeng is formed on second substrate of describing after a while 27.

As the cushion 28 in middle layer structure and above at the cushion described in first embodiment much at one.Can only form cushion when needed.

Preferably, second substrate 27 is transparent and has shape stability, so that optical record medium has certain rigid.That is, preferably, second substrate 27 has high mechanical stability and big rigidity.

As this material, can use resin and glass such as acryl resin, methacrylic resin, polycarbonate resin (amorphous polyolefin especially), vibrin, polystyrene resin, epoxy resin etc.

On second substrate 27, spirality or with having formed recess and protuberance heart-shapedly, to form ditch and bank.Usually, these ditches and/or bank read information as track record with recorded information on second recording layer 25 or from it.Because second recording layer 25 normally forms with coating, so its film thickness is big in ditch portion, thereby ditch portion is suitable for record and reads.Preferably, in this optical record medium, the ditch portion recess of the direction of incident beam (that is, with respect to) that specifies second substrate 27 is as track record 32.Here, " recess " and " protuberance " expression is with respect to " recess " and " protuberance " of the direction of incident beam.Usually, the width of ditch is about 50 to 500nm, and the degree of depth is about 10 to 250nm.When track record was spirality, preferably, track space was about 0.1 to 2.0 μ m.As required, second substrate 27 can have the recessed/protruding hole such as the bank prefabricated pit.

From the angle of cost, preferably, second substrate 27 with this recess and protuberance is formed from a resin, and utilizes the pressing mold with recess and protuberance to make with injection moulding.When on the substrate body that glass etc. is made, forming, can on resin bed, be formed for the recess and the protuberance of track record etc. by the resin bed made such as the radioactive ray hardening resin of light-hardening resin etc.

So far, have as above to what include dyestuff that the write-once type optical record medium (DVD-R) of the recording layer of structure is illustrated, optical record medium is not limited to this example, the present invention can be applied to any optical record medium, if this optical record medium have a plurality of can be by writing down and read the recording of information layer thereon from one side illuminating laser beam.For example, the rewritable optical record medium that the present invention can be applied to have phase change recording layers (for example, DVD-RW, DVD+RW, DVD-RAM etc.), described phase change recording layers be the part of wherein crystal state as recording status/erase status not but not the part of crystalline attitude as the recording layer of recording status, the present invention can also be applied to for example with the Magnetooptic recording medium of magnetic recording layer as recording layer.

When optical record medium is DVD-RW, can be as above-mentioned DVD-R, by bank prefabricated pit recording address information in advance.When optical record medium was DVD+RW, (this was called ADIP: the address in the prefabricated ditch) address information can be superimposed upon in advance the line item of going forward side by side in the swing.

When applying the present invention to contain the rewritable optical record medium of phase change recording layers, first recording layer and second recording layer of the optical record medium in the foregoing description comprise separately: first protective seam, information recording layer and second protective seam.

As the material of this information recording layer, the material that preferably uses its optical constant (refractive index n, extinction coefficient k) to change owing to illuminating laser beam.As this material, for example there is chalkogenide, as contains Ge-Sb-Te based on Te or Se, Ge-Te, Pd-Ge-Sb-Te, In-Sb-Te, Sb-Te, Ag-In-Sb-Te, Ge-Sb-Bi-Te, Ge-Sb-Se-Te, Ge-Sn-Te, Ge-Sn-Te-Au, Ge-Sb-Te-Cr, In-Se, In-Se-Co etc. are as the alloy of principal ingredient, and the alloy that has suitably added nitrogen, oxygen etc. in above alloy.

Material as first protective seam and second protective seam; the material that preferably uses physics and chemically stable, has high-melting-point more and have high softening temperature and do not dissolve each other with the material of information recording layer than information recording layer; because the noise that when illuminating laser beam the cause thermal damage of protection substrate, information recording layer etc. is caused increases, and adjusting is to reflectivity and the absorptivity and the catoptrical phase place etc. of laser beam to suppress.As this material, for example exist: the oxide of Y, Ce, Ti, Zr, Nb, Ta, Co, Zn, Al, Si, Ge, Sn, Pb, Sb, Bi, Te etc.; The nitride of Ti, Zr, Nb, Ta, Cr, Mo, W, B, Al, Ga, In, Si, Ge, Sn, Pb etc.; The carbonide of Ti, Zr, Nb, Ta, Cr, Mo, W, Si etc.; The sulfide of Zn, Cd etc.; Selenide; Telluride; The fluoride of Mg, Ca etc. etc.; The monomer of C, Si, Ge etc.; The dielectric of making by the potpourri of these materials; And the material of handling in the mode identical with dielectric.For first protective seam and second protective seam, can use different materials as required, perhaps can use same material.

At single face incident type optical record medium (for example with a plurality of (being 2 here) recording layers 2 and 5 (22 and 25), the single face incident type DVD-R of double deck type) in, by coming on each layer recorded information from one side illuminating laser beam or read information from each layer, (the best) record/reading conditions (for example following rail polarity, recording impulse strategy, recording power, readout power etc.) is according to each recording layer and marked change.

Particularly, to layer 2 and 5 and layer 22 and 25 record condition to be optimized be important.Even a little departs from record condition also and can read hardly.Yet, when record condition is not the best, may in fact can't recorded information.Perhaps, even can recorded information, signal quality be not good sometimes yet when reading information.

For this reason, information be write down and be read to hope can accurately and reliably under the record/reading conditions (for example, following rail polarity, recording impulse strategy, recording power, readout power etc.) of the recording layer 2 or 5 (22 or 25) that is suitable for carrying out recording of information and reads.

Particularly, in the optical record medium of Class1, the ditch of first substrate 1 protuberance of the direction of incident beam (promptly with respect to) is as track record 11, and the ditch of middle resin layer 4 protuberance of the direction of incident beam (promptly with respect to) is as track record 12, and first recording layer 2 and second recording layer 5 have the identical rail polarity of following thus.On the other hand, in the optical record medium of type 2, the ditch of first substrate 21 protuberance of the direction of incident beam (promptly with respect to) is as track record 31, and the ditch of second substrate 27 recess of the direction of incident beam (promptly with respect to) is as track record 32, and first recording layer 22 and second recording layer 25 have the opposite rail polarity of following thus.

Have the opposite optical record medium that follows rail polarity when using together even first recording layer and second recording layer are had the identical optical record medium that follows rail polarity and first recording layer and second recording layer, also wish to write down accurately and reliably and read information with the rail polarity of following of the structure that is suitable for optical record medium.

According to present embodiment, at least one record/reading conditions of each recording layer 2 and 5 (22 and 25) of optical record medium is recorded in the optical record medium.

Here, record/reading conditions comprises about (for example following rail polarity, the polarity of push-pull signal) or the bank record/information of ditch record (expression whether still be information that ditch follow rail with bank) (below, these are referred to as and follow rail polarity or follow rail information), recording impulse strategy (Write strategy, write-in policy; The laser output control pattern that is suitable for each recording layer), recording power, readout power etc.In addition, record/reading conditions comprises such as the record condition that follows rail polarity, recording impulse strategy (write-in policy), recording power etc., and such as the reading conditions of following rail polarity, readout power etc.

In these record/reading conditions, record/reading conditions except following rail polarity (for example recording impulse strategy, recording power and readout power etc.) can be recorded in each of the recording layer 2 and 5 (22 and 25) that constitutes optical record medium, perhaps can be recorded in any in the recording layer 2 or 5 (22 or 25).

Have following idea: in above-mentioned record/reading conditions, will not be driver at first the rail polarity of following of the recording layer of accessed record layer (for example, the recording layer of the most close laser beam incident side) be recorded in driver at first in the accessed record layer.In other words, follow rail polarity and can only be recorded in driver (that is only one deck in a plurality of recording layers) in the accessed record layer at first.

Following under the unmatched situation of rail polarity and recording layer information that can't reading and recording.For this reason, must pre-determine driver at first accessed record layer (for example, near the recording layer of laser beam incident side) follow rail polarity (bank record or ditch record).

In DVD-R with two recording layers, the information of pre-determining is recorded on the protuberance with respect to the incident beam direction on first recording layer (with respect to the recording layer of laser beam incident side) 2 (22) (bank record), and driver is visited first recording layer 2 (22) at first.Be associated with layer information by the rail polarity of following with other recording layer (second recording layer 5 (25)), and they be recorded in first recording layer 2 (22), driver can follow rail polarity by what read that these information identify second recording layer 5 (25).

Alternatively, can be as first recording layer 2 (22), what pre-determine second recording layer 5 (25) outside first recording layer 2 (22) follows rail polarity.In this case, need not the rail polarity of following of second recording layer 5 (25) is recorded in first recording layer 2 (22).

Even what pre-determine recording layer 5 (25) follows the rail polarity chron, also the rail polarity of following of second recording layer 5 (25) can be recorded on first recording layer 2 (22), driver can be read it and change the predetermined rail polarity of following.Thus, can arbitrarily change except driver at first the recording layer the accessed record layer follow rail polarity.

Therefore, preferably, record/reading conditions only is recorded in the layer near the laser beam incident side between the recording layer 2 and 5 (22 and 25) because driver (recording/reading apparatus) usually visit at first near the layer of laser beam incident side.Thus, the driver of this structure reading and recording/reading conditions fast.

Particularly, preferably, record/reading conditions is recorded in any recordng management area (RMA in recording layer 2 or 5 by prefabricated pit (bank prefabricated pit) or swing; For example, control track, interior circumferential portion) in.

In the optical record medium of type 2, to power recommended in rail polarity, recording impulse strategy, record such as following, the record that reads the record/reading conditions of recommending power etc. is effective with following structure.In the optical record medium of type 2, be particular importance with following that rail polarity is included in record/reading conditions.

That is, the optical record medium of advantageous applications type 2 of the present invention has: first information record body, recording layer by containing first dyestuff to the major general and translucent reflective layer stack gradually having on first substrate of guide channel and form; And second authenticable information recording, form by stacking gradually to major general reflection horizon and the recording layer that contains second dyestuff having on second substrate of guide channel.By the first information being write down the body and second authenticable information recording so that being formed with the side of recording layer fits mutually by the opposed facing mode of printing opacity bonding coat, thereby form the optical record medium of type 2.From the first substrate side illuminating laser beam information is carried out optical recording or reads.

In the recording/reading apparatus (driver) that the information on each recording layer 2 and 5 (22 and 25) of single face incident type optical record medium with a plurality of recording layers is write down and reads, wish and to switch record/reading conditions according to recording layer 2 or 5 (22 or 25), and can carry out recording of information accurately and reliably and read such as recording impulse strategy, recording power, readout power etc.Because record condition the best is even more important, thus wish can be according to recording layer 2 or 5 (22 or 25) thus record condition is switched to top condition recorded information accurately and reliably.

In this case, there is following idea: to a plurality of recording layers 2 and 5 (22 and 25) extra address information and which layer differentiates which layer according to the address information that reads in recording/reading apparatus be continuously.Yet which layer still is difficult to immediately differentiate which layer is.

According to present embodiment, with layer information (about the information of number of record layers; Layer 0, layer 1) be recorded in each recording layer 2 and 5 of optical record medium, so that can immediately switch record/reading conditions according to the recording layer 2 or 5 that will carry out information record or read such as recording impulse strategy (Write strategy, write-in policy), recording power, readout power etc.

As to layer recording of information method, below for example can considering (i) and (ii) shown in method.

(i) for example layer information is recorded in the recordng management area (RMA of each recording layer 2 and 5 (22 and 25) with prefabricated pit (bank prefabricated pit) or swing; For example, control track, interior circumferential portion) in.

(ii) for example layer information is recorded on the almost whole surface of recording areas of each recording layer 2 and 5 (22 and 25) with prefabricated pit (bank prefabricated pit) or swing.

Here, " be recorded on the almost whole surface " and comprise " being recorded on the almost whole surface of recording areas of the recordng management area that comprises each recording layer 2 and 5 (22 and 25) (for example, with layer information as the part of records of address on the recordng management area) ", " layer information being recorded on the whole surface of the recording areas except that the recordng management area of each recording layer 2 and 5 (22 and 25) " etc.Particularly, when layer information can not be recorded in the recordng management area, it was effective layer information being recorded on the whole surface of the recording areas except that recordng management area.The situation of the random access that this writes down or read for information also is effective.

For example, layer information can be carried out record as the part of the address information of swing or prefabricated pit (bank prefabricated pit).Thus, can layer information be recorded on each recording layer 2 and 5 (22 and 25) by simple mode.Layer information write down as the part of address information can provide following advantage: when carrying out random access according to address information with record or when reading information, and only just can readout layer information by visiting desirable address and carrying out focus servo control thereon.Thus, can immediately switch record/reading conditions according to layer information, for example recording impulse strategy, recording power, readout power etc.

As with layer information as the method that the part of address information writes down, for example can consider that following (i) is to (the method v).

(i) as with layer information as the swing in address information (for example, ADIP; Address in the prefabricated ditch) method that a part writes down is for example with address information (for example, the ADIP in the swing in two recording layers 2 and 5 (22 and 25) any; Address in the prefabricated ditch) synchronization pattern that comprises in (synchronization pattern) reverses.

For example, the direction of the synchronization pattern (synchronization pattern) that comprises among the ADIP of direction with respect to first recording layer 2 (22) of the synchronization pattern (synchronization pattern) that comprises among the ADIP with second recording layer 5 (25) reverse (make its opposite).

(ii) as with layer information as the method that the part of swing that forms in the recording areas (comprising recordng management area) of each recording layer 2 and 5 (22 and 25) or the address information in the bank prefabricated pit writes down, make the value of the reservation position in the recording layer 2 and 5 (22 and 25) different.

For example, the value of the reservation position of swing that the value of the reservation position of the swing that forms in the recording areas (comprising recordng management area) of first recording layer 2 (22) or the address information among the LPP is different from form in the recording areas (comprising recordng management area) of second recording layer 5 (25) or the address information in the bank prefabricated pit.

Here, expression is present in the position of the present untapped part in the zone that wherein records address information " to keep the position ".The information that keeps in the position is write down the identical modulating system or the register system that can adopt with modulating system that is used for address information or register system.When medium has a plurality of recording layer, the quantity of the reservation position that must will use according to the number of plies increase of recording layer.For example, when medium has two recording layers, using one as keeping the position, can be 0 or 1 to distinguish the ground floor and the second layer according to this value.When using two when keeping the position,, come so four recording layers can be distinguished from each other because can represent 4 values (that is, 00,01,10 and 11) with two.Similarly, when using three conducts to keep the position,, come so 8 recording layers can be distinguished from each other because can represent 8 values.That is, when using the n position, can distinguish 2n recording layer as the reservation position.If with this method with arrive (iii) such as said method (i) or following method that (other method v) is combined, then can reduce the quantity of the reservation position that will use.

(iii) as the method that layer information is write down as the part of swing that forms in the recording areas (comprising recordng management area) of each recording layer 2 and 5 (22 and 25) or the address information in the bank prefabricated pit, existence is with the swing in two recording layers 2 and 5 (22 and 25) any or a method of reversing of the whole address information in the bank prefabricated pit.

For example, when address 3000-4FFF (sexadecimal) being put into first recording layer 2 (22) and address 5000-6FFF (sexadecimal) is put into second recording layer 5 (25), only with the bit reversal in second recording layer 5 (25), to produce address AFFF-9000 (sexadecimal).

Here, for the purpose of simplifying the description, describe by 16 (being 4 under the situation of 16 system representations).Because add allowance, for example address information reality is represented with 48 (being 12 in the 16 system representations) in DVD-R, so the address of first recording layer 2 (22) is 000000003000-000000004FFFF (Hex), and the address of second recording layer 5 (25) is FFFFFFFFAFFF-FFFFFFFF9000 (Hex).

Simultaneously, must provide the relation information which layer which address realm of expression belongs to driver, driver driver when reading the address can be distinguished layer thus.

(iv) as with layer information as the method that the part of swing that forms in the recording areas (comprising recordng management area) of each recording layer 2 and 5 (22 and 25) or the address information in the prefabricated pit writes down, exist by two (making whole bit reversals+1) and represent the swing in two recording layers 2 and 5 (22 and 25) any or the method for the whole address information in the bank prefabricated pit.

For example, when address 3000-4FFF (sexadecimal) being put into first recording layer 2 (22) and address 5000-6FFF (sexadecimal) is put into second recording layer 5 (25), by two (making whole bit reversals+1) expression second recording layer 5 (25), the address is B000-9001 (sexadecimal) thus.

Here, for the purpose of simplifying the description, describe by only 16 (in the 16 system representations 4).Because add allowance, for example address information reality is represented with 48 (being 12 in the 16 system representations) in DVD-R, so the address of first recording layer 2 (22) is 000000003000-000000004FFF (sexadecimal), and the address of second recording layer 5 (25) is FFFFFFFFB000-FFFFFFFF9001 (sexadecimal).

(v) as with layer information as the method that the part of swing that forms in the recording areas (comprising recordng management area) of each recording layer 2 and 5 (22 and 25) or the address information in the bank prefabricated pit writes down, exist with layer information be recorded in two recording layers 2 and 5 (22 and 25) any swing or the method in the highest significant position of the address information in the bank prefabricated pit.

For example, the value that will obtain by the value counter-rotating with the highest significant position of swing on first recording layer 2 (22) or second recording layer 5 (25) or the address information in the bank prefabricated pit is placed on the swing on another recording layer or the highest significant position of the address information in the bank prefabricated pit.

In fact, for example, when address 000000003000-000000004FFF (sexadecimal) being placed on first recording layer 2 (22) and address 000000005000-000000006FFF (sexadecimal) is placed on second recording layer 5 (25), only make the highest significant position counter-rotating in second recording layer 5 (25).

When in binary number one being reversed, " 0 " becomes " 1 ".When it was expressed as 16 system numbers (sexadecimal), " 0 " became " 8 " in this case.Therefore, the address in first recording layer 2 (22) is 000000003000-000000004FFF (sexadecimal), and the address in second recording layer 5 (25) is 800000005000-800000006FFF (sexadecimal).In addition, driver needs the highest significant position of identification address as layer information.

So far, by apply the present invention to have two recording layers can by write down or read from one side illuminating laser beam information the example of optical record medium be illustrated.Yet, the invention is not restricted to this example.For example, can be by write down or read the optical record medium of information from one side illuminating laser beam with what be applied to have 3 or more a plurality of recording layers independently or in combination with the upper strata information recording method.In this case, above-mentioned layer information recording method can be applied to adjacent two recording layers in a plurality of recording layers.

(2) optical record medium record/read method

Below, the overview of the record/read method of the optical record medium that as above constitutes is described.

By focusing on laser beam irradiation on about 0.5 to 1 μ m diameter from

first substrate

1 or 21 sides on recording layer, carry out the record on the optical record medium that as above obtains.In the part of laser beam irradiation, the thermal deformation of occurrence record layer owing to absorb laser beam energy, as decomposition, themopositive reaction, dissolving etc., its optical property changes thus.

Carry out reading by the difference that reads the reflectivity between the part that part that optical property changes and optical property remain unchanged with laser beam to recorded information.

In the following manner at each enterprising line items of two recording layers with read.The focal position that can distinguish focussed laser beam with the focus error signal of acquisitions such as cutter edge (knife edge) method, method of astigmatism, Foucault (Foucault) method by use is on first recording layer 2 or 22 or on second recording layer 5 or 25.That is, when the object lens that are used for focussed laser beam when vertical direction moves, be to obtain different sigmoid curves on first recording layer 2 or 22 or on second recording layer 5 or 25 according to the focal position of laser beam.Can be by selecting to use which sigmoid curve to select first recording layer 2 or 22 or second recording layer 5 or 25 that to write down or to read.

In the optical record medium of Class1, preferably, on first substrate 1 and middle resin layer 4, form recess and protuberance, and the protuberance of first substrate 1 and the protuberance of middle resin layer 4 are write down and read as track record, as shown in Figure 1.Owing to form dye recording layer with coating usually, so its film is thick in ditch portion, ditch portion is suitable for record and reads thus.In the optical record medium of Class1, preferably, the ditch portion of first substrate 1 protuberance of the direction of incident beam (promptly with respect to) is as track record 11, and the ditch portion of middle resin layer 4 protuberance of the direction of incident beam (promptly with respect to) is as track record 12.

In the optical recording of type 2, preferably, on first substrate 21 and second substrate 27, form recess and protuberance, and the protuberance of first substrate 21 and the recess of second substrate 27 are used as track record to write down and to read, as shown in Figure 2.In addition, there are the polarity of the circulation orbital servo control on first recording layer 22 and the opposite polarity situation of the control of the circulation orbital servo on second recording layer 25.In the optical record medium of type 2, preferably, the ditch portion of first substrate 21 protuberance of the direction of incident beam (promptly with respect to) is as track record 31, and the ditch portion of second substrate 27 recess of incident beam direction (promptly with respect to) is as track record 32.

As the laser beam that is used for this optical record medium (optical record medium of the optical record medium of Class1 and type 2), can use N ₂, He-Cd, Ar, He-Ne, ruby, semiconductor, dye laser etc.Wherein, semiconductor laser because it is in light weight, compact, convenient etc. preferably.

Preferably, the wavelength of employed laser beam is short as far as possible, to carry out high density recording.Particularly, wavelength is that 350 to 530nm laser beam is preferred.As the typical case of this laser beam, having centre wavelength is the laser beam of 405nm, 410nm and 515nm.

Can use blue high-power semiconductor laser of 405nm or 410nm or the light blue high-power semiconductor laser of 515nm to obtain the example that wavelength coverage is 350 to 530nm laser beam.In addition, can by with second harmonic generation unit (SHG) to (a) thus can be with the semiconductor laser of 740 to 960nm fundamental oscillation wavelength continuous oscillation or (b) can be carried out wavelength-modulated with the solid-state laser of 740 to 960nm fundamental oscillation wavelength continuous oscillation by semiconductor-laser-pumped, thereby obtain laser beam.

As above-mentioned SHG, can use any symmetric piezoelectric element that do not reverse, but KDP, ADP, BNN, KN, LBO and chemical combination semiconductor are preferred.As the actual example of second harmonic, be under the situation of semiconductor laser of 860nm at the fundamental oscillation wavelength, there is 430nm as the frequency multiplication ripple of 860nm, under the situation of the solid-state laser of semiconductor laser equal excitation, exist as the LiSrAlF that mixes Cr ₆The 430nm of the frequency multiplication ripple of the 860nm of crystal (the fundamental oscillation wavelength is 860nm).

(3) recording/reading apparatus of optical record medium

The structure of the recording/reading apparatus of optical record medium is as follows, and this recording/reading apparatus records thereon and carries out recording of information on the optical record medium about the information of the number of record layers of each recording layer (layer information) and read.

Recording/reading apparatus (driver) only needs on optical record medium recorded information or from optical record medium reading and recording information therein.For example, recording/reading apparatus comprises: pen recorder (write device) only is used to carry out record; Reading device (reader) only is used to read; And recording/reading apparatus (reader/writer), since be used for writing down and carry out and read.

As shown in Figure 3, recording/reading apparatus 60 comprises: spindle motor 51 is used for driving and rotary optical recording medium 50; Motor driver 52 is used for drives spindle motor 51; Optical read/write head (pickup) 53; Optical R/W head driver 54 is used to drive optical read/write head 53; Servo processor 55 is used to carry out various servocontrol; Signal processing unit (reading processing unit) 56 is used to handle optical read/write head 53 detected signals; Data processing unit (recording processing unit) 57 is used to handle the information of sending from another computing machine etc. (data); And control module 58 (for example, having the microcomputer of CPU 58A and storer 58B), be used to control these devices.

Optical read/write head 53 for example comprises: laser diode, fluorescence detector (for example, photodetector), be used to read-write head actuator that focuses on or follow on rail etc.

As shown in Figure 3, optical R/W head driver 54 comprises: the focus driver 54B of the laser driver of driving laser diode (laser diode drive) 54A, driving read-write head actuator; And drive read-write head actuator follow rail driver 54C.

Laser driver 54A comprises: read laser driver 54Aa, laser diode is read in its driving; With recording laser driver 54Ab, its activation record laser diode.

Servo processor 55 comprises: focus servo circuit 55A is used to carry out focus servo control; With circulation orbital servo circuit 55B, be used to carry out circulation orbital servo control.

Signal processing unit 56 comprises: prime amplifier 56A is used to amplify optical read/write head 53 detected signals; Matrix circuit 56B; The detection signal that is used for amplifying according to prime amplifier 56A generates the address signal [address information (comprising a layer information)] of focus error signal, tracking error signal, swing or bank prefabricated pit and comprises data-signal (information) about the information of record/reading conditions (for example recording impulse strategy, recording power, readout power, follow rail polarity etc.); And demodulator circuit 56C, be used for the address signal [address information that matrix circuit 56B is generated; Comprise number of record layers (layer information)] carry out demodulation.In addition, the data-signal that matrix circuit 56B generates is handled, sent it to computing machine etc. then by binary coding circuit, demodulator circuit etc.

Under address information of utilizing prefabricated pit (ROM hole) to write down in making the process of optical record medium 50 to comprise layer information and the situation about the information of record/reading conditions (for example recording impulse strategy, record are recommended power, read recommendation power, followed rail polarity etc.), signal processing unit 56 can comprise: matrix circuit, binary coding circuit and modulation circuit.

Data processing circuit 57 comprises: modulation circuit 57A is used for modulating from the data and the address information of transmissions such as another computing machine; And Write strategy circuit (write strategy circuit) 57B, be used for according to the recording impulse that will send to recording laser driver 54Ab being controlled (to the multiple-pulse modulation of recording impulse) through modulating data.

Next, with reference to Fig. 4 the processing of carrying out at the recording/reading apparatus 60 of the optical record medium that as above constitutes by control module 58 execution preset programs (for record/read method, recording method, the read method of optical record medium) is described to Fig. 6.

Below, will be that example describes with the situation that records the information on the almost whole lip-deep optical record medium 50 that its middle layer information with two recording layers 2 and 5 (22 and 25) is recorded in recording layer (or read information from it).

At first, with reference to Fig. 4 the record/read method [first record/read method] that comprises layer information read step and record/read controlled step is described.Then, with reference to Fig. 5 and Fig. 6 the record/read method [second record/read method] that also comprises record/reading conditions read step except above-mentioned steps is described.

[first record/read method]

(recording method of optical record medium)

Be used for the recording/reading apparatus of optical record medium (driver) 60, as shown in Figure 4, when from such as the computing machine (perhaps the input block that is equipped with by driver itself) of personal computer etc. when importing recording instruction such as button, the content information district that comprises in the recording areas of control module 58 access medium is to determine and can write in which address.Control module 58 bases are defined as can be in its address that writes, and determining will be at the enterprising line item of which layer (step S10).Control module 58 when medium is set in the driver in advance the accessed content block of information with the situation of reading content information under, control module 58 can be determined according to the content information of reading in advance can at which address writing information.

Under layer information is included in situation in the address information, can by detect the layer information that comprises in the address information determine can on which recording layer writing information.Under the situation that the table that maintains address information associated with each other and layer information is provided to driver, can use this table to determine layer information according to address information.

On the other hand, when when importing reading command, control module 58 is determined recorded information on which recording layer (step S10) according to the address information that comprises in the reading command from the computing machine (the perhaps input block such as button that is equipped with by driver itself) such as personal computer etc.

In this case, when being arranged on medium in the driver, can read content information (representing which bar information is recorded in the information of which address) from medium, display icon on computer screen for example, and comprise the reading command of address information can work as user's clickable icon the time to the driver input.

When having imported recording instruction (or reading command), control module 58 is specified and will be write down the recording layer of (or reading) thereon.This function of control module 58 is called the recording layer determining unit

(recording layer designating unit).

When having imported recording instruction (or reading command), control module 58 indication focus servo circuit 55A carry out focus servo control.In response to this, focus servo circuit 55A controls optical read/write head 53 by focus driver 54 and read-write head actuator, so that first recording layer 2 (22) or second recording layer 5 (25) are carried out focus servo control (step S20).This function of control module 58 is called the focus servo control unit.

Layer information as the part of records of address information under the situation on the almost whole surface of each recording layer 2 and 5 (22 and 25) of optical record medium 50, focus servo circuit 55A can carry out focus servo control optical read/write head 53 is wished the situation of address according to the address message reference under.Be recorded in layer information under the situation of recordng management area of optical record medium 50, focus servo control circuit 55A can carry out focus servo control in this recordng management area.

When recorded information on the optical record medium with a plurality of recording layers (or reading from it under situation of information), can carry out focus servo control in described a plurality of recording layers any.

Next, control module 58 by as prime amplifier 56A, the matrix circuit 56B of signal processing unit 56 and demodulator circuit 56C playback record in the layer information (step S30) of it having been carried out the focus servo control recording layer.This function of control module 58 is called a layer information reading unit.

Control module 58 is judged according to the layer information of reading at step S30 and whether the recording layer of appointment is in the conduct of step S10 appointment recorded information or read the recording layer (step S40) of recording of information layer from it thereon.This function of control module 58 is called the recording layer judging unit.

As judged result, when control module 58 was judged recording layer according to the layer information appointment of reading and is the recording layer (the specific recording layer that will write down) of the designated conduct recording layer that will write down thereon thereon, control module 58 provided recording instruction by data processing unit 57 and recording laser driver 54Ab to optical read/write head 53.In response to this, laser diode is actuated to be recorded in according to the address information of the recording layer that it has been carried out focus servo control and on the address of appointment in the information (data) that the record condition (record/reading conditions) (for example recording impulse strategy, recording power etc.) that is suitable for recording layer (according to layer information and the recording layer of appointment) will send from personal computer or another equipment down, simultaneously by circulation orbital servo circuit 55B with follow rail driver 54C and follow rail control (step S50).This function of control module 58 is called record control unit (record/read control module).

Simultaneously, can determine record/reading conditions according to these conditions by reading the record/reading conditions that is recorded in advance on the optical record medium, perhaps can determine record/reading conditions according to the record/reading conditions that is stored in advance as layer information in the recording/reading apparatus.For example, can write down on optical record medium and recommend power or read recommendation power, driver can be read it and definite in view of the above recording power or readout power.

Alternatively, can will recommend power according to layer recording of information or read and recommend power storage in driver, can read in view of the above and be suitable for layer recording of information and recommend power or read recommendation power, and can or recommend readout power determine recording power or readout power according to the recommendation recording power of being read.

According to circumstances, can after playback record is recommended power, carry out OPC (best power control), and can determine recording power.

When control module 58 is judged according to the layer information of reading and the recording layer of appointment is to be designated as will be from the recording layer of the recording layer that wherein reads (will from the specific recording layer that wherein reads) time, control module 58 provides reading command by reading laser driver 54Aa to optical read/write head 53, with by signal processing unit 56 be suitable for this recording layer (according to layer information and the recording layer of appointment) such as the reading conditions (record/reading conditions) of readout power etc. under to being recorded in and the information in the address of appointment reads, simultaneously by circulation orbital servo circuit 55B with follow rail driver 54C and follow rail control (step S50) according to the address information of the recording layer that it has been carried out focus servo control.This function of control module is called and reads control module (record/read control module).

When control module 58 is judged according to the layer information of reading at step S40 and the recording layer of appointment is not in the time of will writing down the recording layer of (or read from it) thereon, control module 58 turns back to step S20, another recording layer is carried out focus servo control, and repeating similarly to handle (step S20 is to S40), the recording layer of judging the layer information appointment that basis reads up to control module 58 is the recording layer that will write down (or read from it) thereon.

[second record/read method]

(processing when medium loads)

According to present embodiment, when optical record medium is loaded into recording/reading apparatus (driver), according to read the record/reading conditions that is recorded in each recording layer 2 and 5 (22 and 25) on the optical record medium 50 with layer information explicitly from the instruction of control module 58, recommend power, read and recommend power, follow (record/reading conditions read step such as rail polarity as recording impulse strategy, record, record/reading conditions reading unit), these record/reading conditions are associated with the layer information of each recording layer 2 and 5 (22 and 25) and are stored among the storer 58B.

For example, the one deck [first recording layer 2 (22)] that only is recorded in the most close laser beam incident side between the recording layer 2 and 5 (22 and 25) in record/reading conditions goes up and driver is at first visited under the situation of first recording layer 2 (22) drive access first recording layer 2 (22) and the playback record/reading conditions when loaded medium.In this case, what pre-determine first recording layer 2 (22) follows rail polarity, and from first recording layer 2 (22) read follow rail polarity be second recording layer 5 (25) rather than first recording layer 2 (22) follow rail polarity.Record/reading conditions except following rail polarity is the record/reading conditions of each recording layer 2 and 5 (22 and 25).In addition, when pre-determined be not first recording layer second recording layer 5 (25) follow the rail polarity chron, need not to go up these conditions of record at first recording layer 2 (22).

According to present embodiment, particularly, will be recorded as swing or bank prefabricated pit about the information of record/reading conditions (for example recording impulse strategy, record are recommended power, read recommendation power, followed rail polarity etc.).For this reason, in signal processing unit 56, optical read/write head 53 detected information are handled, and it is stored among the storer 58B of control module 58 such as matrix circuit 56B, demodulator circuit 56C etc.

In the time will being recorded as ROM hole or record pit about the information of record/reading conditions (for example recording impulse strategy, record are recommended power, read recommendation power, followed rail polarity etc.), in signal processing unit, optical read/write head 53 detected these information are handled, and it is stored among the storer 58B of control module 58 such as matrix circuit, binary coding circuit, demodulator circuit etc.

(recording method of optical record medium)

Be used for the recording/reading apparatus of optical record medium (driver) 60, when from the time such as the computing machine of personal computer etc. (the input block that is equipped with by driver itself) input recording instruction such as button etc., the content information district that comprises in the recording areas of control module 58 access medium, and determine and can write in which address, as shown in Figure 5.Control module 58 bases are defined as can be in its address that writes, and determining will be in the enterprising line item of which recording layer (steps A 10).In control module 58 accessed content block of information and in advance under the situation of reading of content information when medium is set on the driver, control module 58 can be determined and can write in which address according to the content information of reading in advance.

Under layer information was included in situation in the address information, control module 58 can be determined by detection the layer information in the address information of being included in can be at the enterprising line item of which recording layer.Under the situation that provides the table that maintains address information associated with each other and layer information to driver, control module 58 can utilize this table to determine layer information according to address information.

When having imported recording instruction, as mentioned above, control module 58 is specified the recording layer that will write down thereon according to layer information.This function of control module 58 is called recording layer determining unit (recording layer designating unit).

Next, control module 58 is according to about the layer information at the recording layer of steps A 10 appointments, from storer 58B playback record pulse strategy (steps A 20), and the recording impulse strategy of Write strategy circuit 57B is provided with (steps A 30).

Control module 58 is according to about the layer information at the recording layer of steps A 10 appointments, recommend power (steps A 40) from storer 58B playback record, and recommend power that output value of setting of recording laser driver 54Ab is provided with (step S50) according to the record that is read.

Control module 58 is further according to about the layer information at the recording layer of steps A 10 appointments, reads from storer 58B and follows rail polarity (steps A 60), and the rail polarity of following of circulation orbital servo circuit 55B is provided with (steps A 70).

Be provided with record condition (record/reading conditions) as mentioned above afterwards, control module 58 provides the focus servo control instruction to focus servo circuit 55A.In response to this, focus servo circuit 55A is by focus driver 54B and read-write head actuator control optical read/write head 53, so that first recording layer 2 (22) or second recording layer 5 (25) are carried out focus servo control (steps A 80).This function of control module 58 is called the focus servo control unit.

According to present embodiment and since circulation orbital servo circuit 55B follow rail polarity be set to be suitable for the recording layer of steps A 10 appointments follow rail polarity, so to be suitable for carrying out circulation orbital servo control in the rail polarity of following of the recording layer of steps A 10 appointments.

Layer information as the part of records of address information under the situation on the almost whole surface of each recording layer 2 and 5 (22 and 25) of optical record medium 50, can carry out focus servo control with the address that control module 58 is wanted according to the address message reference.Under layer information is recorded in situation in the recordng management area of optical record medium 50, can in recordng management area, carry out focus servo control.

Be recorded in information under the situation of optical record medium, can carry out focus servo control in described a plurality of recording layers any with a plurality of recording layers.

Next, control module 58 is carrying out the layer information (steps A 90) of the recording layer of focus servo control by prime amplifier 56A, matrix circuit 56B and demodulator circuit 56C playback record as signal processing unit 56 to it.This function of control module 58 is called a layer information reading unit.

Control module 58 is judged according to the layer information of reading in steps A 90 and whether the recording layer of appointment is the recording layer (steps A 100) in steps A 10 appointments.That is, control module 58 judges whether the layer information that reads in steps A 90 is consistent with layer information at the recording layer of steps A 10 appointments.This function of control module 58 is called recording layer judging unit (layer information judging unit).

As judged result, when control module 58 judge according to the layer information that reads and the recording layer of appointment be in steps A 10 appointments recording layer (the specific recording layer that will write down thereon) (promptly, it is consistent with each other that control module 58 is judged two layer information) time, control module 58 is controlled (OPC) (steps A 110) by recording laser driver 54Ab to carrying out best power from the laser beam of laser diode output.Promptly, control module 58 is being arranged on the power calibration area (PCA of interior all sides (or outer circumferential side) that it has been carried out the recording layer of focus servo control with the laser beam of various power, the district is write in examination) in try to write, thus laser power is adjusted to the best power that is suitable at the recording layer of steps A 10 appointments.

According to present embodiment, the booking situation that output value of setting of recording laser driver 54Ab is set to be suitable for recording layer is recommended power, can carry out best power control thus fast.

On the other hand, when control module 58 judge according to the layer information of reading in steps A 100 and the recording layer of appointment be not the recording layer that will write down thereon (promptly, it is not consistent with each other that control module 58 is judged two layer information) time, control module 58 turns back to steps A 80, another recording layer is carried out focus servo control, and repeating the similarity reason, the recording layer of judging according to the appointment of layer information up to control module 58 is the recording layer (steps A 80 to A100) that will write down thereon.

After having carried out best power control as mentioned above, control module 58 provides recording instruction by data processing unit 57 and recording laser driver 54Ab to optical read/write head 53.In response to this, laser diode is actuated to be recorded in according to the address information of the recording layer that it has been carried out focus servo control and the address of appointment (steps A 120) in the information (data) that is suitable under the record condition of recording layer (record/reading conditions) will be for example sending from personal computer or other equipment.This function of control module 58 is called record control unit (record/read control module).

According to present embodiment, owing to the recording impulse strategy (recording impulse modulating mode) of Write strategy circuit 57B is set to be suitable for as described above recording impulse strategy, so carried out recording of information with the recording impulse strategy of the recording layer that is suitable for to write down thereon at the recording layer of steps A 10 appointments.

According to present embodiment, to control to the best power that is suitable at the recording layer of steps A 10 appointments from the power (recording power) of the laser beam of recording laser driver 54Ab output as described above, carry out recording of information with the laser power of the recording layer that is suitable for to write down thereon.

(read method of optical record medium)

Be used for the recording/reading apparatus of optical record medium (driver) 60, when from such as the computing machine of personal computer etc. (the input block that is equipped with by driver self) when having imported reading command such as button, control module 58 determines will read which recording layer, (step B10) as shown in Figure 6 according to the address information that comprises in the reading command.

In this case, when medium is set to driver, can read content information (being illustrated in the information what information which address has write down), for example can be on the screen of computing machine display icon, and when the user clicks this icon, can comprise the reading command of address information to the driver input.

When having imported reading command as described above, control module 58 is specified will be from the recording layer that wherein reads.This function of control module 58 is called recording layer determining unit (recording layer designating unit).

Next, control module 58 is according to the layer information at the recording layer of step B10 appointment, read from storer 58B and follow rail polarity (step B20), and circulation orbital servo circuit 55B is set follow rail polarity (step B30).

Be provided with reading conditions (record/reading conditions) afterwards as described above, control module 58 sends the focus servo control instruction to focus servo circuit 55A.In response to this, focus servo circuit 55A controls optical read/write head 53 by focus driver 54B and read-write head actuator, so that first recording layer 2 (22) or second recording layer 5 (25) are carried out focus servo control (step B40).This function of control module 58 is called the focus servo control unit.

According to present embodiment and since as described above circulation orbital servo circuit 55B follow rail polarity be set to be suitable for the recording layer of step B10 appointment follow rail polarity, so so that be suitable for will following rail polarity and follow rail control from its recording layer that reads.

The part of records that is used as address information in layer information can wish that according to the address message reference address carries out focus servo control with control module 58 under the almost whole lip-deep situation of each recording layer 2 and 5 (22 and 25) of optical record medium 50.Under layer information is recorded in situation in the recordng management area of optical record medium 50, can in this recordng management area, carry out focus servo control.

Has under the situation that the information of carrying out reads on the optical record medium of a plurality of recording layers an enterprising line focusing servocontrol that can be in described a plurality of recording layers.

Next, control module 58 is by as prime amplifier 56A, the matrix circuit 56B of signal processing unit 56 and the demodulator circuit 56C playback record layer information (step S50) at the recording layer that it has been carried out focus servo control.This function of control module 58 is called a layer information sensing element.

Control module 58 is judged according to the layer information of reading at step B50 and whether the recording layer of appointment is the recording layer (step B60) in step B10 appointment.That is, control module 58 judges whether the layer information of reading at step B50 is consistent with layer information at the recording layer of step B10 appointment.This function of control module 58 is called recording layer judging unit (layer information judging unit).

Result as this judgement, when control module 58 judge according to the layer information that reads and the recording layer of appointment be in step B10 appointment recording layer (will from the specific recording layer that wherein reads) (promptly, it is consistent with each other that control module 58 is judged two layer information) time, control module 58 provides reading command by reading laser driver 54Aa to optical read/write head 53.In response to this, laser diode is actuated under being suitable for the record condition of recording layer (record/reading conditions) to be recorded in according to the address information of the recording layer that it has been carried out focus servo control and the information in the address of appointment reads (step B70) by 56 pairs of signal processing units.This function of control module 58 is called and reads control module (record/read control module).

According to present embodiment, owing to will control to the best power that is suitable at the recording layer of step B10 appointment from the power (readout power) of the laser beam that reads laser driver 54Aa output, so to be suitable for and to have carried out reading from the laser power of its recording layer that reads to information.

When control module 58 is judged according to the layer information that reads and the recording layer of appointment is not will be from its recording layer that reads (promptly at step B60, it is mutually internally inconsistent that control module 58 is judged two layer information) time, control module 58 turns back to step B40, another recording layer is carried out focus servo control, and repeat similarity and manage (step B40 is to B60), judge according to the layer information that reads and the recording layer of appointment is the recording layer (that is, two recorded informations are consistent with each other) that will therefrom read up to control module 58.

Advantage according to the optical record medium of present embodiment, the record/read method that is used for this optical record medium and recording/reading apparatus is: because layer information is recorded in optical record medium, immediately switch record/reading conditions so can or read the recording of information layer, as recording impulse strategy, recording power, readout power etc. according to recorded information thereon from it.

Can also under the record/reading conditions (for example, following rail polarity, recording impulse strategy, recording power, readout power etc.) of the recording layer that is suitable for to carry out recording of information or reads, carry out accurately and reliably thereon or read recording of information.

Notice that the present invention is not limited to above example, but can make amendment in every way without departing from the present invention.

The Japanese patent application No.2002-365542 that the application submitted to based on Dec 17th, 2002, the Japanese patent application No.2003-295988 that on August 20th, 2003 submitted to, and the Japanese patent application No.2002-365541 of submission on Dec 17th, 2002, be incorporated herein by reference in its entirety.

Claims

1, a kind of record/read method that is used for optical record medium, described optical record medium has can be by coming thereon from one side illuminating laser beam recorded information or from wherein reading a plurality of recording layers of information, described record/read method may further comprise the steps:

Layer information read step, by the recording layer reading layer information of control module from described a plurality of recording layers, described layer information any mode in the following manner is recorded on each recording layer in described a plurality of recording layer: with the highest significant position counter-rotating of address information, represent whole address informations with all bit reversals of whole address informations and by two; And

Record/read controlled step is controlled by described control module, so that write down or read under the record/reading conditions of the recording layer of appointment according to described layer information being suitable for.

2, the record/read method that is used for optical record medium according to claim 1, further comprising the steps of:

Record/reading conditions read step, by described control module reading and recording in described optical record medium at each the record/reading conditions in the described recording layer.

3, a kind of recording/reading apparatus that is used for optical record medium, described optical record medium have can be by coming thereon from one side illuminating laser beam recorded information or from wherein reading a plurality of recording layers of information, described recording/reading apparatus comprises:

Layer information reading unit, be used for a reading layer information from described a plurality of recording layers, described layer information any mode in the following manner is recorded on each recording layer in described a plurality of recording layer: with the highest significant position counter-rotating of address information, represent whole address informations with all bit reversals of whole address informations and by two; And

Record/read control module is used to control, so that write down or read under the record/reading conditions of the recording layer of appointment according to described layer information being suitable for.

4, the recording/reading apparatus that is used for optical record medium according to claim 3, described device also comprises:

Record/reading conditions reading unit, be used for reading and recording described optical record medium at each the record/reading conditions in the described recording layer.

5, a kind of optical record medium writes down or reads with the record/read method that is used for optical record medium according to claim 1 thereon, and described optical record medium comprises:

A plurality of recording layers can be by from one side illuminating laser beam recorded information or from wherein reading information thereon;

Each of described recording layer records a layer information on it;

Wherein, described layer information any one in the following manner is recorded: the highest significant position of the address information of any that will be in two adjacent recording layers in described a plurality of recording layers reverses, with all bit reversals of whole address informations of a recording layer and whole address informations of representing a recording layer by two.

6, optical record medium according to claim 5, wherein, described optical record medium has two recording layers as described a plurality of recording layers.

7, optical record medium according to claim 5 wherein, is recorded in each the described record/reading conditions in the described recording layer at least one.

8, optical record medium according to claim 7, wherein, described record/reading conditions comprises the rail information of following.

9, optical record medium according to claim 7, wherein, described record/reading conditions comprises recording impulse strategy and/or record recommendation power.

10, optical record medium according to claim 7, wherein, described record/reading conditions is recorded on the layer near the laser beam incident side in the described recording layer.

11, according to each described optical record medium of claim 5 to 10, wherein, each in the described recording layer all is the recording layer that comprises dyestuff.